Protection structure and rail transit cable

Abstract

The utility model relates to the technical field of cable protection, in particular to a protection structure and a rail transit cable. Comprising a hollow sleeve, a reinforced sheath arranged on the outer wall of the hollow sleeve, ribs arranged on the outer wall of the reinforced sheath, a ribbed outer sheath sleeving the outer wall of the reinforced sheath, and ribs arranged on the outer wall of the ribbed outer sheath. The protection structure and the rail transit cable provided by the utility model have the advantages of good tensile property, good wear resistance, reduced electromagnetic interference between adjacent wires, capability of filling the internal space of the cable, improved utilization rate of the internal space of the cable, and more compact structure of the cable.

Description

Technical Field

[0001] This utility model relates to the field of cable protection technology, and in particular to a protective structure and rail transit cable. Background Technology

[0002] Rail transit cables are an indispensable component of urban rail transit systems, and their quality directly affects the safe, stable, and efficient operation of the rail transit system.

[0003] With the rapid development of urban construction, the railway market and subway systems have placed higher demands on rail transit cables. In rail transit systems, cables may be subjected to mechanical stresses such as vibration, impact, and tension, especially in areas with frequent train operations. These stresses can affect the structural integrity of the cable and may lead to insulation damage or conductor breakage under long-term exposure. Traditional rail transit cables have poor abrasion resistance and compressive strength during laying and use, and their internal space utilization is low. Furthermore, rail transit projects are often space-constrained, and cables inevitably suffer damage such as friction during installation. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above or prior art, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a protective structure that solves the problems caused by the poor wear resistance and compressive strength of traditional rail transit cables during laying and use.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a protective structure, comprising a hollow sleeve, a reinforced sheath disposed on the outer wall of the hollow sleeve, ribs disposed on the outer wall of the reinforced sheath, a ribbed outer sheath sleeved on the outer wall of the reinforced sheath, and ribs disposed on the outer wall of the ribbed outer sheath.

[0008] As a preferred embodiment of the protective structure of this utility model, there is a space between the reinforced sheath and the ribbed outer sheath; a steel wire is provided between the hollow sleeve and the reinforced sheath; a wrapping strap is tightly attached to the inner wall of the ribbed outer sheath; and a first filling is provided in the unoccupied portion of the space.

[0009] As a preferred embodiment of the protective structure described in this utility model, the steel wires are arranged in a compact ring between the hollow sleeve and the reinforced sheath.

[0010] In a preferred embodiment of the protective structure described in this utility model, the cross-section of the reinforcing rib is square.

[0011] In a preferred embodiment of the protective structure described in this utility model, the cross-section of the rib is square.

[0012] As a preferred embodiment of the protective structure of this utility model, the ribs are arranged in an equidistant ring on the outer wall of the reinforced sheath; the ribs are arranged in an equidistant ring on the outer wall of the ribbed outer sheath.

[0013] The beneficial effects of the protective structure of this utility model are: it improves the tensile strength of the cable and makes the cable more wear-resistant.

[0014] Another objective of this invention is to provide a rail transit cable that addresses the problem of low internal space utilization in cables.

[0015] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a rail transit cable, comprising a protective structure; a first insulating sleeve disposed in a space, a first conductor disposed inside the first insulating sleeve; a first sheath disposed in the space, a second insulating sleeve disposed on the inner wall of the first sheath, and a signal line disposed inside the second insulating sleeve; the first insulating sleeve and the first sheath are arranged in a ring-shaped, equidistant, alternating array in the space.

[0016] In a preferred embodiment of the rail transit cable of this utility model, a shielding layer is tightly attached to the inner wall of the first sheath near the signal line, and a second filler is provided between the shielding layer and the second insulating sheath.

[0017] In a preferred embodiment of the rail transit cable of this utility model, the number of the first sheaths in the array is not limited; the number of the first insulating sleeves in the array is 3 to 5.

[0018] In a preferred embodiment of the rail transit cable of this utility model, the first conductor is made of a tile-shaped conductor.

[0019] The beneficial effects of this utility model of rail transit cable are: it can reduce electromagnetic interference between adjacent lines, fill the internal space of the cable, improve the utilization rate of the internal space of the cable, and make the cable structure more compact. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a schematic diagram of the protective structure and the cross-section of the rail transit cable in this utility model.

[0022] Figure 2 This is a schematic diagram of the protective structure and the cross-section of the rail transit cable in this utility model.

[0023] Figure 3 This is a schematic diagram of the protective structure and the cross-section of the rail transit cable in this utility model. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0027] Example 1

[0028] Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a protective structure 100, including a hollow sleeve 101, a reinforced sheath 102 disposed on the outer wall of the hollow sleeve 101, a rib 102a disposed on the outer wall of the reinforced sheath 102, a ribbed outer sheath 103 sleeved on the outer wall of the reinforced sheath 102, and a rib 103a disposed on the outer wall of the ribbed outer sheath 103.

[0029] The hollow bushing 101 uses a hollow structure to reduce material usage and the overall weight of the cable. The reinforced sheath 102 uses elastomeric polyurethane to enhance performance. Polyurethane, as a polymer material, has excellent mechanical properties and is highly malleable. The reinforced sheath 102 provides additional tensile strength and stability on top of the tensile strength and stability of the hollow bushing 101. Multiple ribs 102a are provided on the reinforced sheath 102. The ribbed outer sheath 103 is made of polyolefin. Polyolefin, as a polymer material, is resistant to high temperatures. It has good electrical insulation properties and multiple ribs 103a are provided on the ribbed outer sheath 103. The ribs 103a on the surface of the ribbed outer sheath 103 are worn first during use. The outer wall of the hollow bushing 101 is in close contact with the inner wall of the reinforced sheath 102. There is a space between the reinforced sheath 102 and the ribbed outer sheath 103 to accommodate the cable conductor. The ribs 103a are on the outer wall of the ribbed outer sheath 103. The ribs 103a can be produced as an integral part of the ribbed outer sheath 103 or attached to an existing sheath.

[0030] In use, the space between the reinforced sleeve 102 and the ribbed outer sheath 103 is filled with the necessary cable structure such as cable conductor and insulation. When laid or damaged by collision, the ribs 103a of the ribbed outer sheath 103 will be worn first. Under tension, the ribs 102a of the reinforced sheath 102 can effectively play a role in tensile resistance and stability.

[0031] In summary, this utility model improves the tensile strength and stability of the cable through the internal hollow sleeve 101 and the ribs 102a on the reinforced sheath 102. The ribs 103a on the ribbed outer sheath 103 prevent the sheath surface from being directly worn. Instead, the ribs 103a wear first, extending the service life of the ribbed outer sheath 103 and acting as a protective sleeve. This allows the protective structure 100 to achieve strong wear resistance and compressive strength in practical applications.

[0032] Example 2

[0033] Reference Figures 1-2 The second embodiment of this utility model includes a space 104 between the reinforced sheath 102 and the ribbed outer sheath 103; a steel wire 105 is provided between the hollow sleeve 101 and the reinforced sheath 102; a wrapping strap 106 is tightly attached to the inner wall of the ribbed outer sheath 103; and a first filling 104a is provided in the unoccupied portion of the space 104.

[0034] The space 104 is approximately cylindrical under the constraints of the reinforced sheath 102 and the ribbed outer sheath 103. There is space between the hollow sleeve 101 and the reinforced sheath 102 to accommodate the steel wire 105. It should be noted that the outer wall of the steel wire 105 is in close contact with the outer wall of the hollow sleeve 101, and the outer wall of the steel wire 105 is also in close contact with the inner wall of the reinforced sheath 102. The first filler 104a is a water-blocking rope filler. The main function of the water-blocking rope filler is to seal and waterproof the cable to protect its insulation and conductivity.

[0035] Furthermore, the steel wires 105 are arranged in a tight ring between the hollow sleeve 101 and the reinforced sheath 102.

[0036] The outer wall of the hollow sleeve 101 and the inner wall of the reinforced sheath 102 are cylindrical. The annular compact arrangement means that when the outer wall of the hollow sleeve 101 and the inner wall of the reinforced sheath 102 are cylindrical, the space between the hollow sleeve 101 and the reinforced sheath 102 is annular. The steel wires 105 are compactly arranged around the outer wall of the hollow sleeve 101 within this annular arrangement. It should be noted that the compact arrangement means that the steel wires 105 are arranged to the maximum extent so that the steel wires 105 are tightly attached to each other.

[0037] Furthermore, the cross-section of the rib 102a is square.

[0038] When the cross-section of the reinforcing bar 102a is square, the square shape is more regular and easier to process compared to other shapes.

[0039] Furthermore, the cross-section of the rib 103a is square.

[0040] When the cross-section of rib 103a is square, the square shape is more regular and easier to process than other shapes.

[0041] Furthermore, the reinforcing ribs 102a are arranged in a ring-shaped equidistant array on the outer wall of the reinforced sheath 102; the ribs 103a are arranged in a ring-shaped equidistant array on the outer wall of the ribbed outer sheath 103.

[0042] Among them, the reinforced sheath 102 is a cylinder when there are no ribs 102a on the outer wall. The ribs 102a are arranged in an equidistant array on the outer wall of the reinforced sheath 102. It should be noted that in order to achieve the wear resistance effect, the number of ribs 102a on the outer wall of the reinforced sheath 102 is at least four. The ribs 103a are arranged in an equidistant array on the outer wall of the ribbed outer sheath 103. It should be noted that in order to achieve the tensile stability effect, the number of ribs 103a on the outer wall of the ribbed outer sheath 103 is at least four.

[0043] In use, the space between the hollow sleeve 101 and the reinforced sheath 102 is filled with tightly arranged steel wires 105. The space 104 between the reinforced sleeve 102 and the ribbed outer sheath 103 is filled with the cable conductor, insulation and other necessary cable structures. The space 104 not occupied by the necessary structures is filled with the first filler 104a water-blocking rope to protect the cable's waterproof and conductive properties. When laid or damaged by collisions, the ribs 103a of the ribbed outer sheath 103 will be worn first. Under tension, the ribs 102a and steel wires 105 of the reinforced sheath 102 can effectively play a role in tensile resistance and stability.

[0044] In summary, this utility model improves the tensile strength and stability of the cable through the internal hollow sleeve 101 and the ribs 102a on the reinforced sheath 102. The ribs 103a on the ribbed outer sheath 103 prevent the sheath surface from being directly worn, instead allowing the ribs 103a to wear first, thus extending the service life of the ribbed outer sheath 103 and acting as a protective sleeve. In addition, the use of water-blocking ropes for filling and protection enhances the waterproof and conductive properties, enabling the protective structure 100 to achieve strong wear resistance and pressure resistance in practical applications.

[0045] Example 3

[0046] Reference Figures 1-3 This is the third embodiment of the present invention, which further provides a rail transit cable 200. It also includes a first insulating sleeve 201 disposed within a space 104, a first conductor 201a disposed inside the first insulating sleeve 201; a first sheath 202 disposed within the space 104, a second insulating sleeve 202a disposed on the inner wall of the first sheath 202, and a signal line 202b disposed within the second insulating sleeve 202a; the first insulating sleeve 201 and the first sheath 202 are arranged in a circular, equidistant, alternating array within the space 104.

[0047] In this cable, the outer wall of the first insulating sleeve 201 contacts the inner wall of the wrapping tape 106 and the outer wall of the reinforcing sheath 102. Heat is generated during the power transmission process of the first conductor 201a. The first insulating sleeve 201 is made of cross-linked polyethylene, a polymer material with excellent heat resistance and insulation properties, making it very suitable as the insulation layer of a cable. The first insulating sleeve 201, as the insulation layer of the rail transit cable 200, ensures that the current flows within the first conductor 201a without leaking to the outside. Simultaneously, the first insulating sleeve 201, as the insulation layer, allows the first conductor 201a to... One conductor 201a is unaffected by external factors, extending its service life. The first sheath 202 is also made of cross-linked polyethylene to protect its internal structure. The second insulating sleeve 202a is also made of cross-linked polyethylene, with its outer wall in contact with the inner wall of the first sheath 202. There are at least two second insulating sleeves 202a inside the first sheath 202. Each second insulating sleeve 202a contains a signal line 202b, which completely occupies the interior of the second insulating sleeve 202a. When the material of 02b is stranded copper conductor, signal line 202b has good corrosion resistance and conductivity. Signal line 202b transmits various signals such as data transmission, sensing information, and control information, therefore signal line 202b needs good corrosion resistance and conductivity. The space 104 between the reinforced sheath 102 and the ribbed outer sheath 103 is approximately cylindrical. The first insulating sleeve 201 and the first conductor 201a inside it, and the first sheath 202 and the second insulating sleeve 202a inside it, and the signal line 202b are all within the ribbed outer sheath 103. The inner wall of 03 is arranged in an alternating array at equal intervals along the circumference. This reduces electromagnetic interference between adjacent lines and makes the internal structure of the rail transit cable 200 more compact. It should be noted that the number of the first insulating sleeve 201 and its internal first conductor 201a, and the number of the first sheath 202 and its internal second insulating sleeve 202a and signal line 202b in space 104 can be changed in actual use. The number of the first insulating sleeve 201 and its internal first conductor 201a is at least three and no more than five, and the number of signal lines 202b is arbitrary and not limited.

[0048] Furthermore, a shielding layer 203 is tightly attached to the inner wall of the first sheath 202 near the signal line 202b, and a second filler 204 is provided between the shielding layer 203 and the second insulating sleeve 202a.

[0049] The shielding layer 203 is in close contact with the inner wall of the first sheath 202 near the signal line 202b, and also with the outer wall of the second insulating sleeve 202a. The shielding layer 203 is made of aluminum-plastic composite tape and tinned copper wire braid, which has excellent shielding effect and will not affect the overall flexibility and bending radius of the rail transit cable 200. The function of the shielding layer 203 is to prevent the magnetic field generated when the first conductor 201a transmits current from interfering with the signal transmission of the signal line 202b. The second filler 204 is made of PP rope. It should be noted that PP rope refers to polyethylene rope. The use of PP rope as the material for the second filler 204 can effectively fill the unused gaps in the shielding layer 203 except for the second insulating sleeve 202a and the signal line 202b inside. At the same time, the use of PP rope for the second filler 204 can also improve the flexibility of the cable, improve its tensile and compressive strength, and provide moisture protection.

[0050] Furthermore, the number of the first sheath 202 in the array is not limited; the number of the first insulating sleeve 201 in the array is 3 to 5.

[0051] Furthermore, the first conductor 201a is made of a tile-shaped conductor.

[0052] In particular, since the laying environment of rail transit cables is relatively narrow, the use of a corrugated conductor for the first conductor 201a can make the outer diameter of the finished cable smaller than that of a round conductor. This can save the space required for the installation of the rail transit cable 200 and the material for the outer wrapping, thereby reducing costs and improving material utilization. At the same time, the contact between the conductors in the corrugated design is closer, which helps to reduce the contact resistance between the conductors, thereby improving the power transmission efficiency of the rail transit cable 200 and improving the internal space utilization of the rail transit cable 200, making the internal structure of the rail transit cable 200 more compact.

[0053] In use, the space between the hollow sleeve 101 and the reinforced sheath 102 is filled with tightly arranged steel wires 105. The space 104 between the reinforced sleeve 102 and the ribbed outer sheath 103 is provided with a ring-shaped alternating array of a first insulating sleeve 201 and its inner first conductor 201a, and a first sheath 202 and its inner second insulating sleeve 202a, signal line 202b, shielding layer 203, and second filler 204. The unoccupied space 104 is filled with a first filler 104a water-blocking rope to protect the cable's waterproof performance. Regarding conductivity, during installation and damage such as impacts, the ribs 103a of the ribbed outer sheath 103 will wear down first. Under tension, the ribs 102a and steel wires 105 of the reinforced sheath 102, along with the second filler 204, can effectively provide tensile strength and stability. The rail transit cable 200 adopts a ring-shaped conductor and signal line 202b alternating array structure, which can effectively reduce electromagnetic interference between adjacent wire pairs, making signal transmission cleaner, especially suitable for data and voice communication. The ring-shaped alternating array structure is relatively simple to manufacture, has low material costs, and is more economical in the long run due to its high-efficiency signal transmission characteristics, while also improving the internal space utilization of the rail transit cable 200.

[0054] In summary, this utility model improves the tensile strength and stability of the cable through the internal hollow sleeve 101 and the ribs 102a on the reinforced sheath 102. The ribs 103a on the ribbed outer sheath 103 prevent direct wear on the sheath surface; instead, the ribs 103a cause wear first, extending the service life of the ribbed outer sheath 103 and acting as a protective sleeve. Furthermore, the use of water-blocking ropes for filling and protection enhances waterproof and conductive properties. This ensures that the protective structure 100 achieves strong wear resistance and compressive strength in practical applications. The first insulating sleeve 201 inside the space 104, together with the first conductor 201a and the first sheath 202 inside it, and the second insulating sleeve 202a, signal line 202b, shielding layer 203, and second filler 204 inside it, adopt a structure in which the first conductor 201a and signal line 202b are arranged in an alternating ring array in the space 104. This effectively reduces electromagnetic interference between adjacent lines, making signal transmission purer. At the same time, it improves the space utilization rate inside the rail transit cable 200 and makes the internal structure of the rail transit cable 200 more compact.

[0055] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0056] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0057] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A protective structure (100), characterized in that: It includes a hollow sleeve (101), a reinforced sheath (102) disposed on the outer wall of the hollow sleeve (101), a rib (102a) disposed on the outer wall of the reinforced sheath (102), a ribbed outer sheath (103) sleeved on the outer wall of the reinforced sheath (102), and a rib (103a) disposed on the outer wall of the ribbed outer sheath (103).

2. The protective structure as described in claim 1, characterized in that: There is a space (104) between the reinforced sheath (102) and the ribbed outer sheath (103); a steel wire (105) is provided between the hollow sleeve (101) and the reinforced sheath (102); a wrapping tape (106) is tightly attached to the inner wall of the ribbed outer sheath (103); and a first filler (104a) is provided in the unoccupied portion of the space (104).

3. The protective structure as described in claim 2, characterized in that: The steel wire (105) is arranged in a tight ring between the hollow sleeve (101) and the reinforced sheath (102).

4. The protective structure as described in claim 3, characterized in that: The cross-section of the rib (102a) is square.

5. The protective structure as described in claim 4, characterized in that: The cross-section of the rib (103a) is square.

6. The protective structure as described in claim 5, characterized in that: The reinforcing bars (102a) are arranged in a ring at equal intervals on the outer wall of the reinforced sheath (102); the ribs (103a) are arranged in a ring at equal intervals on the outer wall of the ribbed outer sheath (103).

7. A rail transit cable (200), characterized in that: The protective structure includes any one of claims 1 to 6, a first insulating sleeve (201) disposed in the space (104), a first conductor (201a) disposed inside the first insulating sleeve (201); a first sheath (202) disposed in the space (104), a second insulating sleeve (202a) disposed on the inner wall of the first sheath (202), and a signal line (202b) disposed in the second insulating sleeve (202a); the first insulating sleeve (201) and the first sheath (202) are arranged in a ring-shaped, equidistant, alternating array in the space (104).

8. The rail transit cable as described in claim 7, characterized in that: The inner wall of the first sheath (202) near the signal line (202b) is tightly fitted with a shielding layer (203), and a second filler (204) is provided between the shielding layer (203) and the second insulating sleeve (202a).

9. The rail transit cable as described in claim 8, characterized in that: The number of the first sheath (202) in the array is not limited; the number of the first insulating sleeve (201) in the array is 3 to 5.

10. The rail transit cable as described in claim 9, characterized in that: The first conductor (201a) is made of a tile-shaped conductor.

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